function fn() {
	var cellSize = document.documentElement.getAttribute("data-dpr");
	if (void 0 == cellSize) {
		/** @type {number} */
		cellSize = 1;
	}
	/** @type {number} */
	var cols = document.documentElement.clientWidth / cellSize;
	/** @type {number} */
	var colsL = document.documentElement.clientHeight / cellSize;
	return [cols , colsL];
}